First Pair Guarantee - Love them Or They're Free

Step One packaging is made from 100% compostable materials. The Step One bag is composed of PLA (Polylactic acid), corn starch and PBAT (Polybutyrate Adipate Terephthalate).

PLA is a bio-based plastic derived from renewable resources, in this and most other cases corn starch. Therefore PLA is often referred to as corn starch plastic.

There are several advantages of PLA:

  • PLA is made from corn starch, which is a renewable resource.
  • PLA doesn't contain toxins.
  • Producing PLA makes less greenhouse gas emissions, compared to standard plastics.
  • The Step One bag is certified compostable according to AS4736.
  • Less energy is needed in order to produce PLA, compared to producing standard plastics.
While our Step One bag is certified biodegradable and compostable according to AS4736, it is not made 100% from renewable materials.

PBAT is petroleum-based and can therefore not be classified as made from renewable sources.

That said PBAT is actually enhancing the composting process and leaves no toxins when composted.

PBAT is known for its flexibility and toughness. This makes it perfect for combination with other biodegradable plastics that have high strength, but are very brittle (like corn starch plastic). This combination is a great way to replace standard plastics with an environmentally safe and biodegradable alternative, that will harmlessly degrade in a short time.

The reason for using PBAT combined with PLA, is that it preserves and enhances the biodegradability of the PLA and adds flexibility and strength similar to standard plastics.

Sources and useful links:





AS4736 Standard:

Sizing Chart
2XS 55-60cm
XS 65-70cm
Medium 85-90cm
Large 95-100cm
Extra Large 105-110cm
2XL 115-120cm




If you're between sizes, then go up a size ☝️
THICKER Legs? Then go for the BOXER BRIEFS
THIN Legs? Then TRUNKS are for you

Our 30-Day First Pair Guarantee means you can try 1 pair for up to 30 days and if it's the wrong size, then we'll send out a different size, for FREE. Yeah.. Free 💪
Note: If the replacement pair is still not a good fit, we can no longer process a refund or send another replacement pair. I'm sure you'd understand!